Codrenix Toolbox logoCodrenix Toolboxby Codrenix

Resize Image

Set exact pixel dimensions for your JPG, PNG or WebP image — with aspect-ratio lock and handy social media presets.

All image tools

Quick answer

Resize an image online free — set exact pixel dimensions for JPG, PNG or WebP, with an aspect-ratio lock and handy presets, right in your browser. Built for marketplace sellers, blog posters and anyone matching a required size. Resizing happens on your device; the image is never uploaded.

Drag & drop an image here

or click to browse — JPG, PNG or WebP up to 20MB

Image files only — up to 20MB each

How to resize an image online

  1. Upload an image

    Drag and drop a JPG, PNG or WebP image (up to 20 MB) onto the tool.

  2. Set the dimensions

    Enter the width and height, keep the aspect-ratio lock on to avoid distortion, or use a preset.

  3. Download the resized image

    Save the resized image from your browser in the same format as the original.

Key features

Exact dimensions

Type the width and height you need — the output matches precisely.

Aspect-ratio lock

Keep proportions automatically, or unlock for a deliberate stretch.

Handy presets

Common sizes are one click away instead of looking up pixel values.

Supported formats

  • Input: JPG/JPEG, PNG or WebP, one file up to 20 MB
  • Output: resized image in the same format as the original

Privacy and security

Resizing uses the browser canvas entirely on your device. The image is loaded, scaled locally and downloaded from your browser — it is never uploaded to a server.

Limitations

  • One image at a time, up to 20 MB.
  • Enlarging far beyond the original size will look soft — downscaling gives the best quality.
  • Output format matches the input format.

Related Tools

All tools

Compress Image

Shrink JPG, PNG or WebP files with a quality slider and see the before/after size instantly.

Image ToolLive
Open Tool

Convert Image

Convert images between JPG, PNG and WebP right in your browser — no uploads, no sign-up.

Image ToolLive
Open Tool

Merge PDF

Combine multiple PDF files into one document in the order you want.

PDF ToolLive
Open Tool

Frequently Asked Questions

Is it safe to resize my images here?

Yes. Your image is processed entirely in your browser using the Canvas API. It is never uploaded to any server — resizing happens on your own device.

What does the aspect-ratio lock do?

When enabled (the default), changing the width automatically adjusts the height — and vice versa — so the image keeps its original proportions and never looks stretched or squashed. Turn the lock off to set width and height independently.

Which formats can I resize?

JPG/JPEG, PNG and WebP files up to 20MB. The resized image downloads in the same format as the original.

Will resizing reduce image quality?

Shrinking an image generally keeps it looking sharp because pixels are removed smoothly. Enlarging beyond the original size can look softer, since the browser has to invent new pixels.

Do I need to install anything?

No. Everything runs in your browser with JavaScript — just drop in an image, set the dimensions, and download the result.